Making spirally-wound tubes.



C. F. JENKINS.

MAKING SPIRALLY WOUND TUBES.

APPLICATION FILED MAY 25, 1908.

Patented Mar. 23, 1969.

v a mmwoi attoum UNITED STATES PATENT OFFICE.

, CHARLES FRANCIS JENKINS, OF WASHINGTON, DISTRICT OF COLUMBIA, ASSIGNOR TO JAMES GAYLEY, A. R. TURNER, AND A. HENDERSON. TRUSTEES, ALL OF NEW YORK, N. Y.

- MAKING SPIRALLY-WOIIND TUBES.

Specification of Letters Patent.

Patented March 23, 1909.

Application flied May 25, 1908. Serial No. 434,728.

- Toell whom. it may concern:

Be it known that I, CHARLES FRANCIS JENKINS, citizen of the United States, residing at ashington, in the District of Columbia, have invented certain new and useful Improvements in Making Spirally-Wound Tubes, of which the following is a specification, reference being-had therein to the accompanyin-g drawing.

la -preparing strips of paper stock for making spirally wound waterproof paper tubes it is desirable to apply the waterproofing material to one face and both edges of each stri without permitting'sueh material to reach any portion of the remaining face, to which adhesive is to be applied. To apply thus this waterproofing material perfectly and I rapidly has heretofore proved a very difiicult paper strips.

matter since in applying it to the edges of the strips it has not been found a simple matter to prevent it from reaching the marginal portions of that face which should free from it, since its presence prevents proper adhesion of these marginal portions and when a formed tube has been cut transversely to form short segments, marginal non-adherent portions become loose slender tapering strips at the ends of the tubes. If these tube segments are to be made into waterproof boxes, for example, the failure to secure perfect adhesion of thcse marginal portions makes perfect closure by bottoms and tops very uncertain, and at the same time leaves a glued surface accessible. to the liquid that may be placed in the box. Obxiously, therefore, the evil becomes a very serious matter.

In the accompanying drawings, Figure 1 is a plan view of apparatus for preparing the Fig. 2 is a side elevation of the same devices. Fig. 3 is a view similar to Fig. 2 showing a slight modification.

In these figures, A, A represents a series of rotary shearing devices mounted upon shafts B, B for. dividing a sheet Q of stock into strips C, C These strips move on together, after the shearing, alternate strips passing under a guide roller D and the remaining strips passing under a like roller D, slightly above the plane of the .roller D. From the rollers D, D all the strips pass over an adjacent roller E, the lower side of which runs in a waterproofing liquid' in a tank F and thus applies the liquid to the lower faces of all the strips. Owing to the relative locabe absolutely tion of the rollers D, D the strips passing below the former strike the rol er E a little sooner than the strips from the roller D and their edges are at this instant offset slightly,

downwardly, with respect'to the latter, so that the liquid applied by the roller E passes over their exposed edges, but an instant later the edges of theother rub over these exposed edges as the two sets return into registry and all rest together on the roller E. The application of the liquid to the edges is thus assured while at the same time any surplus liquid is effectually prevented from reachin the upper faces of any of the strips. From the roller E all the strips except the marginal ones, pass beneath a third guide roller G and thence to rollers or drums H, H upon which they are wound. The rollers H, which receive alternate strips of the set, are imounted upon a shaft I, while the remaining strips ass to. the rollers II mounted upon a shaft not in the same horizontal plane as the shaft I. By this means interferehee of neighboring strips, in winding, is avoided. After the strips pass the roller E, the marginal strips-which are merely the usual parts trimmed from the sheethaving sei (l their purpose are discarded and not wound upon the rollers. Fig. 3 shows substantially the same devices except that the roller D is omitted. With certain kinds of stock and liquid, the one roller sufiiees, the liquid entering the out between the strips str as to properly coat or impregnate'them al-, though there is no offsetting.

It is to be understood that the term liquid as here used includes pasty liquids or any material having sufficient fluidity to flow or be ,brushed over the surface of the stock;.and it is obvious that it may be adhesive in charaeter.

What I claim is:

1. In apparatus of the class described,

the combination with means for advancing a sheet of stock, of means for slitting the advancing sheet, means for throwing alternate strips slightly out of re istry with the remaining strips to offset the edges of the two setsfand means for applying liquid to one face of one set of strips during such offsetting.

2. In apparatus of the class described, the combination with'means for advancing a sheet of stock, of means for slitting the advancing sheet into strips, and means for applying liquid to one face 05 the divided advancing Ski-EC while the edges 0% adjacant straps prevent'surpius hquld from passing over. the edges is films opposlbe 5&6?) 9f any I). Tbs combination 0% flitting shears, the flying z'uiisr, two guide rollers,

horizontal planes, adjacent to plying $91121, and distinct wind- 3 hquld a ammw Windm g, respectively, alternate strips, and

the remaining strips.

in testimony whereof I affix my signature in pres e'hce of two witnesses. CHARLES FRANCIS JENKINS.

W'itnsses:

W. CLARENCE DUVALL, WALLACE GREENE. 

